OpenCart Not Working In My Website

Website URL

Viewer Site: https://jerseyvault.xo.je/

Admin Site:https://jerseyvault.xo.je/admin

Error Message

404 Error - Not Found

Other Information

I installed it using Script Installer provided by Softaculous, but after install it gave a confirmation that it had successfully installed OpenCart in my site. But upon opening the admin site or the viewer site, it would give a 404 error. Any ideas why this error is coming up?

Softaculous Confirmation Message:

The Confirmation Message provided by Softacoulus is pasted above.

Please help me out in this situation as I am a beginner in these type of applications.